连续顶升液压控制系统仿真分析与验证

针对大型结构物连续同步顶升技术原理,使用四桩腿支点、每个桩腿支点4个顶升油缸的支撑结构;单支点内采用基于同步分流液压泵的容积同步控制方式;支点间采用基于位移模糊的多点主从同步控制方式。建立了基于同步分流液压泵的液压系统和基于位移模糊控制的控制系统的仿真模型并进行联合仿真。对大型结构物连续同步顶升系统样机进行同步顶升试验,并对实验数据进行分析。结果表明:受实际工况中各种因素所导致的误差影响,实际同步误差比仿真同步误差略大,但仍满足同步要求,验证了所设计的液压控制系统的应用可行性。

水下生产设施液压控制仿真系统

为解决水下生产设施液压控制系统设计过程繁琐等问题,将AMESim软件的液压仿真技术与Visual Basic软件设计技术相结合,并将之应用于参数校核和系统仿真分析中。开展了对水下生产液压控制系统的工作原理以及组成元件的分析,建立了辅助软件设计与基本设计思路之间的关系,提出了水下生产设施液压控制仿真系统;在AMESim环境下开发了一套针对水下生产系统的液压元件库,实现了仿真领域的专业性;同时在Visual Basic程序开发上,根据设计人员输入的参数,校核相关标准,并将计算与输入的数据自动导入至AMESim仿真系统中,实现了水下生产系统仿真的过程控制;在中国海洋石油公司的一个项目中对辅助设计软件的功能和操作进行了评估。测试结果表明,针对水下生产设施液压控制仿真系统的设计开发可为相关设计人员提供界面友好、操作清晰的设计平台。

基于FluidSIM的专用折弯机电液系统仿真

本文依托专用折弯机原理与要求,基于FluidSIM软件对其液压与控制系统进行仿真,并将仿真结果与实际生产相结合,为设备运行、维护、优化提供支持。

Modeling and identification of HAGC system of temper rolling mill

Including servo valve, hydraulic cylinder, mill and sensor and ignoring nonlinear factors, the linear dynamic model of hydraulic automatic gage control(HAGC) system of a temper rolling mill was theoretically derived. The order of the model is 4/4, and can be reduced to 2/2. Based on modulating functions method, utilizing numerical integration, we constructed the equivalent identification model of HAGC, and the least square estimation algorithm was established. The input and output data were acquired on line at temper rolling mill in Shangshai Baosteel Group Corporation, and the continuous time model of HAGC system was estimated with the proposed method. At different modulating window intervals, the estimated parameters changed remarkably. When the frequency bandwidth of modulating filter matches that of estimated system, the parameters can be estimated accurately. Finally, the dynamic model of the HAGC was obtained and validated based on the spectral analysis result.